JPH0398563U - - Google Patents
Info
- Publication number
- JPH0398563U JPH0398563U JP731390U JP731390U JPH0398563U JP H0398563 U JPH0398563 U JP H0398563U JP 731390 U JP731390 U JP 731390U JP 731390 U JP731390 U JP 731390U JP H0398563 U JPH0398563 U JP H0398563U
- Authority
- JP
- Japan
- Prior art keywords
- image sensor
- analog signal
- comparator
- signal
- level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 1
Landscapes
- Facsimile Image Signal Circuits (AREA)
Description
第１図は本考案の一実施例のブロツク図、第２
図は階調信号出力回路の動作を説明するための図
、第３図は従来の一例のブロツク図、第４図はＡ
Ｄ変換器を用いた場合のブロツク図である。
１……ＣＣＤイメージセンサ、５……階調信号
出力回路、６……コンパレータ、７……ゲートア
レイ、８……ＤＡ変換部。
Fig. 1 is a block diagram of an embodiment of the present invention;
The figure is a diagram for explaining the operation of the gradation signal output circuit, FIG. 3 is a block diagram of a conventional example, and FIG. 4 is an A
It is a block diagram when a D converter is used. 1... CCD image sensor, 5... Gradation signal output circuit, 6... Comparator, 7... Gate array, 8... DA conversion section.
Claims (1)
じたレベルのアナログ信号を得るイメージセンサ
と、 該イメージセンサからのアナログ信号レベルと
閾値レベルとを比較するコンパレータ、該コンパ
レータによる比較結果に応じて該閾値レベルを所
定の規則で可変出力するゲートアレイにて構成さ
れる逐次比較方式の回路で、上記イメージセンサ
からのアナログ信号を、一画素当り複数ビツトを
有するデジタル信号に変換する回路と を有してなる白黒ハンデイイメージスキヤナ。[Claims for Utility Model Registration] An image sensor that reads characters, figures, images, etc. and obtains an analog signal at a level corresponding to the degree of shading thereof; a comparator that compares the analog signal level from the image sensor with a threshold level; This is a successive approximation circuit consisting of a gate array that variably outputs the threshold level according to a predetermined rule according to the comparison result of the comparator, and converts the analog signal from the image sensor into a digital signal having multiple bits per pixel. A black and white handy image scanner comprising a circuit for converting into a signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP731390U JPH0398563U (en) | 1990-01-29 | 1990-01-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP731390U JPH0398563U (en) | 1990-01-29 | 1990-01-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0398563U true JPH0398563U (en) | 1991-10-14 |
Family
ID=31510973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP731390U Pending JPH0398563U (en) | 1990-01-29 | 1990-01-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0398563U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200449759Y1 (en) * | 2009-08-31 | 2010-08-06 | 비오티스아시아 주식회사 | Car washing machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61164368A (en) * | 1985-01-17 | 1986-07-25 | Ricoh Co Ltd | Hand scanner |
| JPH01160219A (en) * | 1987-12-17 | 1989-06-23 | Nec Corp | Successive approximation a/d converter |
-
1990
- 1990-01-29 JP JP731390U patent/JPH0398563U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61164368A (en) * | 1985-01-17 | 1986-07-25 | Ricoh Co Ltd | Hand scanner |
| JPH01160219A (en) * | 1987-12-17 | 1989-06-23 | Nec Corp | Successive approximation a/d converter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200449759Y1 (en) * | 2009-08-31 | 2010-08-06 | 비오티스아시아 주식회사 | Car washing machine |
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